However Good Asset Management Practice (GAMP) needs to be in place across all disciplines to ensure the goals of asset management can be achieved.

GAMP cannot be left in peoples' heads. GAMP is real and must be agreed, documented and insisted upon.
Standard Operating Procedures ('SOP') could be part of GAMP, but having some SOP is not GAMP.
Audited, up to date Safe Working Methods ('SWMS') are part of GAMP.